Creates separate output directories for workflow run in pipeline associated with runner name

[singhd789]

• creates output dir based off runner number (to associate with runner if there are multiple running)
• (to-do: ensures there's no race condition for 2 runners accessing same output directory)
• could potentially solve permission denied errors we see every once in a while with the ppp-setup folder in the cloud?

Ciheim brought in this branch in his fork, created 2 different runners, and started them around the same time:

• they both ran at the same time (no waiting around)
• created different ppp-setup output directories with cylc-run dir
  • can see this with the uploaded archive files:
  • runner 1: https://github.com/Ciheim/fre-workflows/actions/runs/19113157075/job/54615250677#step:7:4
  • runner2: https://github.com/Ciheim/fre-workflows/actions/runs/19113159063/job/54615257983#step:7:4

BUT - in those pipelines, the workflow took 3 HOURS AND 33 MINUTES, no bueno
Currently testing running 2 at the same time but accessing different history file locations

Here is successful output from a pipeline run:
https://github.com/NOAA-GFDL/fre-workflows/actions/runs/20470921836/job/58825830669